There's no elegant way around it: Seville simply doesn't have long-haul service, so business class from Louisville to Seville always means a routing puzzle, and the most reliable answer involves connecting through either Chicago, Philadelphia, or Charlotte on American Airlines before crossing the Atlantic to a European gateway—typically London Heathrow via British Airways or Madrid via Iberia—then dropping south on a regional hop into SVQ. In practice, I've found the Iberia routing through Madrid works best for this itinerary, since Iberia's transatlantic business class product on the A330 and A350 fleet, with fully flat seating in a staggered configuration, gets you into Madrid-Barajas with generous connection time to catch one of Iberia's short regional flights down to Seville, a city whose small airport rewards patience over speed.
The British Airways alternative through Heathrow deserves consideration too, particularly if your American Airlines domestic leg routes through Philadelphia or Charlotte, where transfer times to BA's long-haul cabins are generally manageable. BA's Club Suite, with its sliding door and direct aisle access, is the more modern hard product compared to Iberia's, and I've had smoother experiences making tight Heathrow connections through Terminal 5 than fighting Madrid's sprawling layout during peak summer congestion. My insider tip: book the Iberia routing whenever possible in spring, since Iberia has historically released more premium award and discounted business inventory on the Madrid-Seville domestic leg during April and May, effectively upgrading what would otherwise be an economy regional hop.
Seasonally, April, May, September, and October remain the sweet spot—cooler Andalusian temperatures align with lower fares and better availability across all three carriers, avoiding both summer's heat and its premium pricing. Given how fragmented this route is, and how fare and award space fluctuates weekly between AA, BA, and Iberia's connecting options, setting up automated fare alerts is genuinely the smartest way to catch a well-priced Louisville to Seville business class itinerary before it disappears.